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Preparation of Highly Porous Coordination Polymer Coatings on Macroporous Polymer Monoliths for Enhanced Enrichment of Phosphopeptides
Published on: July 14, 2015
Polímeros de coordinación porosos enlazados con hidrógeno: transformación estructural, propiedades de sorción y
Kazuhiro Uemura1, Kazuya Saito, Susumu Kitagawa
1Environmental Science and Engineering, Graduate School of Science and Engineering, Yamaguchi University, Tokiwadai 2-16-1, Ube-shi, Yamaguchi 755-8611, Japan. kazu-u@yamaguchi-u.ac.jp
Journal of the American Chemical Society
|December 15, 2006
Resumen
Se sintetizaron tres nuevos polímeros de coordinación de cobalto (II). El compuesto 3 exhibe adsorción y desorción de moléculas invitadas reversibles, con un mecanismo de reacción de orden cero para la desorción.
Área de la Ciencia:
- Coordinación Química de la Coordinación
- Ciencia de los materiales Ciencia de los materiales.
- La cristalografía es una técnica de cristalografía.
Sus antecedentes:
- Los polímeros de coordinación (PC) son materiales cristalinos con diversas aplicaciones.
- El diseño de CPs con estructuras porosas específicas es crucial para la química huésped-huésped.
- Los CPs basados en cobalto (II) ofrecen interesantes propiedades magnéticas y catalíticas.
Objetivo del estudio:
- Para sintetizar y caracterizar nuevos polímeros de coordinación de cobalto.
- Investigar las características estructurales y las capacidades de incorporación de invitados de estos CPs.
- Para estudiar el comportamiento de adsorción-desorción y la cinética de reacción de un CP. cargado de invitados.
Principales métodos:
- Difracción de rayos X monocristalino para la determinación estructural.
- Espectroscopia infrarroja para la caracterización.
- Calorimetría de barrido diferencial (DSC) para el análisis termodinámico.
- Experimentos de adsorción/desorción isotérmica para estudios cinéticos.
Principales resultados:
- Se sintetizaron tres nuevos polímeros de coordinación de cobalto ((II), [CoCl2 ((4-pmna) 2) n, {[Co ((NCS) 2 ((4-pmna) 2) ].2Me2CO} n, y {[Co ((4-pmna) 2 ((H2O) 2) } ((NO3) 2.2CH3OH} n, los cuales también fueron sintetizados.
- Todos los compuestos cuentan con cadenas de doble cadena 1D "de tipo romboide repetido" con cavidades rectangulares.
- El compuesto 3 demostró la captura de moléculas invitadas reversibles (agua y metanol) a través de enlaces de hidrógeno, con un mecanismo de desorción de orden cero y una energía de activación de ~ 100 kJ / mol.
Conclusiones:
- El ligando N-pyridin-4-ylmethyl) nicotinamida (4-pmna) forma efectivamente cadenas poliméricas de coordinación 1D con el cobalto (II).
- La disposición estructural dicta la incorporación de los huéspedes, con el compuesto 3 mostrando propiedades significativas de anfitrión-huésped.
- El Compuesto 3 exhibe adsorción/desorción de invitado reversible, ofreciendo potencial para la separación molecular o aplicaciones de detección.
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